GULF OF MEXICO 



593 



Page 



nematodes 313, 357 



abundance in mud 319 



acclimation of 320 



anatomy of 313 



associated with Microciona 319 



classes 



Aphasmidea 314 



Phasmidea 314 



distribution of 318 



ecology of 319 



eggs of 320 



embryology 320 



food of 319 



free-living : 313 



habitat 319 



herbivorous 319 



list of species 314 



locomotion 319 



molting 320 



parasites in Fucus 319 



parasites in Nassa 319 



parasitic 357 



predators 319 



Nematopsis 244, 247, 485 



distribution of 247 



in mollusks - 249 



parasite in oysters 244 



Nematopsis ostrearum 247 



Nematopsis penaeus 248, 249 



Nematopsis prytherchi 248 



nemertean, parasite in blue crab 334 



nemerteans 303 



commensal 304, 309 



distribution 303, 304 



ecology 304 



food of 304 



in bivalves 309 



in crabs 307 



key to species 305 



orders 



Bdellonemertea 309 



Heteronemertea 306 



Hoplonemertea 307 



Paleonemertea 305 



parasitic 304, 307 



regeneration 304 



reproduction 304 



Neomeris annulata 183 



Neophyllophorus, key to species 404 



New Orleans, fortifications 18 



Newman, R. J 519 



nicker-bean 195 



Nielsen, J. N 28, 144 



Nielsen's theory 123 



nitrate 165 



distribution 147 



Florida Straits 147 



Mississippi River 147 



nitrogen 147 



Page 

 nitrate — Continued 



Yucatdn Channel 147 



nitrite 148 



distribution 148 



nitrogen 148 



nitrogen-phosphorus ratio 175 



nitrogen, source of in Red Tide 175 



Noctiluca scintillans 224 



Noland, L. E 244,252,253,255 



Norris, R. M 204 



northers 95 



Nosema nelsoni, in shrimp 251 



Nueces Bay, pollution . 573 



nursery grounds 204 



Nymphon 425 



occurrence of giant squid 476 



Oceanites oceanicus 523 



Oceanodroma leucorhoa 523 



oceanography 



physical 119 



shallow water 136 



octopus 475 



Ocypode albicans 211 



Ocyurus chrysurus 508 



Offatts Bayou 



death of fish 225 



Oidemia nigra 524 



Oikopletira tortugensis 496 



oil companies 32 



platform 93 



spots 81 



Oligocene 70 



Oncholaimium oxyure 320 



O'Neill, M. E 196 



Ohshima, H 397 



Onu phidae 211 



Onykia carribaea 475 



Oolite, Miami 55 



Oosting, H. J 198 



Ooze 76 



foraminifera 78, 82 



globigerine . 80, 8 1 , 82 



pteropod 82 



Ophiuroidea, list of species 376 



Opuntia dillenii 195 



Orchestia 211 



orchid 195 



Oregon 30,449,471,475 



organic compounds, in sea water 149 



organic matter 



decomposition of 220 



in sea water 149 



Ornithocercus quadratus 224 



Osburn, R. C 361 



oscillation, free period 114 



Osorio Tafall, B. F 166, 171 



Ostenfeld, C. H 193 



Ostracoda 429 



distribution in relation to temperature 431 



